dome mids are not popular but this Zaph's design is rated top class Zaph|Audio - ZDT3.5 it uses Dayton RS52 dome, it has diameter of 52mm (2") cloth dome. Don't expect much bass but dispersion is wide.

the above dome midrange is designed by peter larsen and I even have the Finecone software and there is the same dome midrange there as simulation sample and I did the simulations till 4.5khz and see no breakups till there...

I fooled with 2" dome mids for a while (admittedly long ago) and concluded that they have little value unless one is building a 4-way. What worked best for me was a small mid-bass of 4-6" like the old Dynaudio mid-bass, or maybe a small Focal like you'd find in an MTM system. I think the crossover ends up in an unfortunate place with the 2" and it didn't seem to match up well with any serious woofer.

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I may be barking up the wrong tree, but at least I'm barking!

I fooled with 2" dome mids for a while (admittedly long ago) and concluded that they have little value unless one is building a 4-way. What worked best for me was a small mid-bass of 4-6" like the old Dynaudio mid-bass, or maybe a small Focal like you'd find in an MTM system. I think the crossover ends up in an unfortunate place with the 2" and it didn't seem to match up well with any serious woofer.

agreed on that behalf that matching the speed of the dome drivers is tough unless until it has to be really fast.. yeah domes do well at higher crossovers like 1.5khz and up and I would like to cross it at 2khz especially the 2 inch mid dome as there is no problem for the midbass driver doing till 2khz..